Across
- 4. How most animals reproduce
- 6. Animals without a spine
- 8. Germ layer with muscles & circulatory system
- 9. Type of symmetry in most animals with 3 germ layers
- 10. concentration of sensory nerves and cells
- 13. Fertilization that occurs within the body
- 14. Germ layer with outer layers & coverings
- 15. Germ layer with digestive tract
Down
- 1. Animals that receive heat from outside sources
- 2. Fertilization that occurs outside the body
- 3. Animals with a spine, also known as Chordate
- 5. How animals respond to environmental changes
- 7. How animals are classified or grouped together
- 11. God-given knowledge animals have without being taught
- 12. Animals that make heat through their metabolism